How to distinguish between expressways, trunk roads, secondary trunk roads, and branch roads

There are four levels of urban roads, which are expressways.

Trunk roads, secondary trunk roads, and branch roads.

Rapid is a long-distance connectivity road in the city, generally between groups and satellite cities.

The connecting road with the main city, suburbs and the main city, etc., is designed to have a high speed, separated by a first-class separation zone, and the degree is also relatively high.

The main road is the traffic artery connecting the main districts of the city, and is the main artery within the city.

The "transportation" function is the main function, supplemented by the service function. The design speed is higher, and there is generally a ** divider to separate, and the road degree is higher.

The secondary trunk road is a large number of general traffic roads in the city, which forms an urban trunk road network with the main roads, plays the role of connecting various parts and collecting and distributing traffic, and has the function of service. The design speed is about 40kmh, and it is generally 3 lanes in both directions.

The branch road plays a connecting role, mainly connecting the secondary trunk road and the neighborhood road, solving the problem of residents going home and going out, and mainly serving the function. Road width.

Narrower. An auxiliary road is a road that is installed on the side or side of the road for vehicles that cannot enter the main road.

The way to distinguish these nouns, I personally think that there are two points: it depends on the strength of the road, the two-way road with more than 6 lanes is either a trunk road or an expressway, and the roads with less than 4 lanes in both directions are mostly secondary trunk roads or branch roads; The second is to see if there is **separation, the road with **separation is of high grade, and the grade of no is low.

Urban road grade

According to the status, role, traffic function and service function of the road in the urban road system, China currently divides the urban road into four categories: expressway, trunk road, secondary trunk road and branch road.

One of the expressways is in megacities.

Or set up in large cities, is to use the first separator to separate the up, down and down vehicles, for the car dedicated to the expressway, mainly to connect the main areas of the urban area, urban areas and the main suburbs, satellite towns, contact the main outgoing road, bear the main passenger and freight traffic in the city, have a higher speed and large capacity.

The trunk road is the skeleton of the urban road network, connecting the city's main industrial areas, residential areas, ports, airports and stations, and undertaking the main traffic tasks of the city. It is not advisable to build too many pedestrian and vehicular entrances on both sides of the main road, otherwise the speed of vehicles will be reduced.

The secondary trunk road is an ordinary traffic trunk road in the urban area, which forms an urban trunk road network with the main road, which plays a role in connecting various parts and distributing and sharing the traffic load of the trunk road. The secondary trunk road has a service function, allowing the placement of public buildings on both sides that attract **.

and parking should be available. The branch road is the connecting line between the secondary trunk road and the neighborhood road, which is set up to solve the traffic in the local area, and is mainly used for service functions.

The above content reference: Encyclopedia - Urban Road Grade.

According to the provisions of CJJ 37-90 of the Code for Urban Road Design:

According to the status of roads in the road network, traffic functions and service functions of buildings along the route, urban roads are divided into four categories:

1. Expressway.

Expressways should serve a large number of long-distance, rapid transportation in the city. There should be an intermediate sub-belt between the opposite roadway of the expressway, and its entrance and exit should be fully controlled or partially controlled.

There should be no entrances and exits for public buildings that attract a lot of traffic on both sides of the expressway. The entrances and exits of general buildings on both sides should be controlled.

Second, the main road.

The main road should be the trunk road connecting the main subdivisions of the city, and the traffic function should be the mainstay. When there is a large volume of bicycle traffic, it is advisable to use the form of separation of motor vehicles and non-motor vehicles, such as three roads or four roads.

There should be no entrances and exits of public buildings that attract a large amount of traffic on both sides of the main road.

3. Secondary roads.

Secondary roads should be combined with trunk roads to form a road network, play the role of collecting and distributing traffic, and have service functions.

Fourth, the branch road. The branch road should be the connecting line between the secondary trunk road and the neighborhood road, which solves the local traffic and focuses on service functions.

Please refer to the above specifications for specific design requirements.

Look for a stop and give way sign.

Legal analysis: 30-40 meters for the main road, 20-24 meters for the secondary road, and 14-18 meters for the branch road.

Legal basis: "Code for Design of Urban Road Engineering" Urban roads should be divided into four levels: expressways, trunk roads, secondary trunk roads and branch roads according to the status of the road in the road network, traffic functions and service functions along the route, and should comply with the following provisions:

1.The expressway should be separated, all access controlled, the spacing and form of entrances and exits should be controlled, and the continuous traffic should be realized, and there should be no less than two lanes in one direction, and there should be supporting traffic safety and management facilities. The expressway should not be set up to attract a large number of traffic, public buildings that are outflowing.

2.The main roads should connect the main sub-districts of the city and should be mainly used for traffic functions. On both sides of the main road, it is not advisable to set up entrances and exits of public buildings that attract a large number of traffic flows.

3.Secondary roads should be combined with trunk roads to form a trunk road network, which should be mainly used for the function of collecting and distributing traffic, and also have service functions.

4. Should the branch road be connected with the secondary trunk road and internal roads such as residential areas, industrial areas, and transportation facilities? Local traffic should be solved, and service functions should be the mainstay.

The difference between trunk road and branch road is:

First, the reference is different.

1. Trunk road: a driving lane specially built for motor vehicles from one city to another.

2. Branch road: a small road branched out from a trunk road.

Second, the focus is different.

1. Trunk roads: the main way of transportation.

2. Side road: a narrow section of the road to reach the destination.

Third, the driving rules are different.

2. Branch roads: The traffic level is lower than that of the main road, and the vehicles that are driving normally on the main road should be courteous when merging into the main road.

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1. The magnitude of the current flowing is different. In a circuit, a trunk refers to the path through which the total current flows, while a branch refers to a branch of the trunk circuit. 2. The connected objects are different.

In the circuit, the trunk circuit is generally connected to the power supply part, while the branch circuit is separated from the trunk circuit, that is, many branches are connected to the trunk circuit. 3. The connection method is different. The trunk circuit is the total part in the circuit, which is generally connected in series, while the branch circuit must be connected in parallel.

The parallel relationship separates the branch and the trunk circuit in the circuit: the parallel circuit connects the components in parallel to form a circuit, which is characterized by: the current of the trunk circuit is divided into two parts in the branch, and flows through each element in the two branches respectively.

For example: the connection of various electrical appliances in the home. In the parallel circuit, the switch on the trunk road is closed, the switch on the branch road is closed, the bulb will shine, the switch on the trunk road is disconnected, the switch on each branch road is closed, and the bulb will not emit light, indicating that the switch on the trunk road can control the entire circuit, and the switch on the branch road can only control the branch.

Trunk Road: The route through which the total current of a parallel circuit flows, like a tree trunk. Branch: The route through which the branch current of a parallel circuit flows, like a tree branch. The electric keys on the main road can control the electrical appliances on the branch circuit, which refers to the circuit parts that are not directly connected to the two ends of the power supply through the electrical appliances.

Slip roads give way to trunk roads.

A side road refers to: a path.

Trunk road refers to: main road.

According to the existing urban road requirements in China, the spacing of main roads is 800-1200 meters, and the spacing of small urban roads can be about 500 meters. This is what I found online.

In the Code for Urban Road Traffic Planning and Design

1500 2500 m Trunk road 700 1200 Secondary trunk road 350 500 Side road 150 250 m.

Expansion:

According to the status and traffic function of roads in the urban road system, they are divided into: expressways, trunk roads, secondary roads, and branch roads.

Expressway. Roads built to smoothly handle the city's heavy traffic. It should have a smooth line type, separate from the general road, so that the car traffic is safe, smooth and comfortable.

Three-dimensional intersection should be used when intersecting with trunk roads with large traffic volumes, and plane crossings can be used when intersecting with branch roads with small traffic volumes, but there should be measures to control traffic. When there are non-motorized vehicles on both sides, a complete divider must be provided.

Trunk roads. The traffic arteries connecting the main parts of the city are the skeleton of the urban roads, and their main function is transportation. Motorized and non-motorized lanes.

Apply the isolation tape separately. Rapid motor vehicles such as passenger cars on trunk roads with heavy traffic should also be separated from slower trucks and buses. There should be sidewalks of appropriate width on both sides of the main road.

Pedestrians crossing arterial roads should be strictly controlled.